This isn't working? (Inventory GUI)

I'm trying to make a Custom Inventory GUI, and I'm making it detect the position of where it is, to tell if it's going to open or not. But for some reason it isn't working. Please help!

-- InventoryHandler
-- MLGsLoveMtnDew

                    ----[Local Variables]----
                    Player  =game.Players.LocalPlayer;
                    Mouse   =Player:GetMouse();
                    ----[GUI Variables]----
                    InventoryOverlap    =script.Parent;
                    InventoryIcon   =InventoryOverlap:WaitForChild("InventoryIcon");
                    InventoryMain   =InventoryOverlap.Parent:WaitForChild("InventoryMain");
                    ----[Images]----
                    InventoryClosed ="http://www.roblox.com/asset/?id=267375889"
                    InventoryOpened ="http://www.roblox.com/asset/?id=267375860"
                    ----[Mouse Icons]----
                    MouseDefaultIcon    ="http://www.roblox.com/asset/?id=265193813"
                    MouseHoverIcon  ="http://www.roblox.com/asset/?id=265196119"
                    MouseClickIcon  ="http://www.roblox.com/asset/?id=265561302"
                    MouseInventoryIcon  ="http://www.roblox.com/asset/?id=267378716"    


InventoryIcon.MouseButton1Click:connect(function()
    if InventoryIcon.Position == UDim2.new(-2, 0, -5, 0) then
        InventoryMain:TweenPosition(UDim2.new(-2, 0, 1.2, 0), Enum.EasingDirection.Out, Enum.EasingStyle.Bounce, 2, false)
    elseif InventoryIcon.Position == UDim2.new(-2, 0, 1.2, 0) then
        InventoryMain:TweenPosition(UDim2.new(-2, 0, -5, 0), Enum.EasingDirection.Out, Enum.EasingStyle.Back, 2, false) 
    end
end)
Mouse.KeyDown:connect(function(key)
if key == "e" then
    if InventoryIcon.Position == UDim2.new(-2, 0, -5, 0) then
        InventoryMain:TweenPosition(UDim2.new(-2, 0, 1.2, 0), Enum.EasingDirection.Out, Enum.EasingStyle.Bounce, 2, false)
    elseif InventoryIcon.Position == UDim2.new(-2, 0, 1.2, 0) then
        InventoryMain:TweenPosition(UDim2.new(-2, 0, -5, 0), Enum.EasingDirection.Out, Enum.EasingStyle.Back, 2, false) 
    end
    end
end)

Thank you!